
Diagnostic procedure

Dtc p0038
Dtc p0102Mazda 6 Service Manual: Heater core inspection
1. Remove the A/C unit. (See A/C UNIT REMOVAL/INSTALLATION.)
2. Remove the heater core from the A/C unit.
3. Inspect for cracks, damage, and coolant leakage.
If any problems are found, replace the heater core.
4. Inspect for bent fins.
If any are bent, use a flathead screwdriver to stra ...
Mazda 6 Service Manual: Control Switches
Temperature control dial
This dial controls temperature. Turn it clockwise for hot and counterclockwise
for cold.
NOTE
When the mode is set to or
with the fan control dial in a
position other than 0 and the temperature control dial in the maximum cold position,
the air intake selector sw ...